undroppedWiktionary 原文英美undropped1词源 1构词拆解unun-前缀droppeddropped词干un-(added to adjectives or past participles) not · (added to nouns) lack of词源说明From un- + dropped.释义形容词adjective1Not dropped.undropped2词源 2释义动词verb1simple past and past participle of undrop